Due to the abolition of plugin technology in Firefox 60+, the Workspace app installed under Linux is no longer automatically recognized.
Solution
If your device has IGEL OS 10.05, update to IGEL OS 10.06; if applicable, you can also upgrade to IGEL OS 11.02. If your device has IGEL OS 11.01, update to IGEL OS 11.02. IGEL OS 10.06 and IGEL OS 11.02 have been adapted for a workaround that requires server-side modifications.